Zachary Turner f070dd590e [codeview,pdb] Try really hard to conserve memory when reading. ... PDBs can be extremely large. We're already mapping the entire PDB into the process's address space, but to make matters worse the blocks of the PDB are not arranged contiguously. So, when we have something like an array or a string embedded into the stream, we have to make a copy. Since it's convenient to use traditional data structures to iterate and manipulate these records, we need the memory to be contiguous. As a result of this, we were using roughly twice as much memory as the file size of the PDB, because every stream was copied out and re-stitched together contiguously. This patch addresses this by improving the MappedBlockStream to allocate from a BumpPtrAllocator only when a read requires a discontiguous read. Furthermore, it introduces some data structures backed by a stream which can iterate over both fixed and variable length records of a PDB. Since everything is backed by a stream and not a buffer, we can read almost everything from the PDB with zero copies. Differential Revision: http://reviews.llvm.org/D20654 Reviewed By: ruiu llvm-svn: 270951		2016-05-27 01:54:44 +00:00
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CodeView	[codeview,pdb] Try really hard to conserve memory when reading.	2016-05-27 01:54:44 +00:00
DWARF	Recommit r270547 ([llvm-dwarfdump] - Teach dwarfdump to decompress debug sections in zlib style.)	2016-05-24 12:48:46 +00:00
PDB	[codeview,pdb] Try really hard to conserve memory when reading.	2016-05-27 01:54:44 +00:00
Symbolize	Fix some Clang-tidy modernize-deprecated-headers and Include What You Use warnings; other minor fixes.	2016-05-09 23:11:38 +00:00
CMakeLists.txt	LLVM CodeView library	2015-12-24 18:12:38 +00:00
LLVMBuild.txt	LLVM CodeView library	2015-12-24 18:12:38 +00:00